hi

i am trying this code, but only works in firefox

What is the problem?


DEMO

Code JavaScript:
$(".mydds").msDropDown();
        $('#adicionar').click (function(){
            var num = $('.linguas').length;
            var newNum = new Number(num + 1);
 
            var newElem = $('#copiar' + num).clone(true, true).attr('id', 'copiar' + newNum);
 
            var id = newElem.find('select').msDropDown().data('dd').get('id');
 
            newElem.html(newElem.html().replace(id,'customid_' + newNum,'g'));
 
            $('#copiar' + num).after(newElem);
 
            newElem.find('select').msDropDown();
        });
thanks